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Derivatives and Hedging Activities (Schedule of Balance Sheet Classification and Fair Values of Derivative Instruments) (Details)
In Thousands, unless otherwise specified |
Dec. 31, 2014
USD ($)
|
Dec. 31, 2013
USD ($)
|
Dec. 31, 2014
Foreign Exchange Contract [Member]
Other current assets [Member]
Designated as Hedging Instrument [Member]
Cash Flow Hedge [Member]
USD ($)
|
Dec. 31, 2013
Foreign Exchange Contract [Member]
Other current assets [Member]
Designated as Hedging Instrument [Member]
Cash Flow Hedge [Member]
USD ($)
|
Dec. 31, 2014
Foreign Exchange Contract [Member]
Other current assets [Member]
Not Designated as Hedging Instrument [Member]
USD ($)
|
Dec. 31, 2014
Foreign Exchange Contract [Member]
Other current assets [Member]
Not Designated as Hedging Instrument [Member]
EUR (€)
|
Dec. 31, 2013
Foreign Exchange Contract [Member]
Other current assets [Member]
Not Designated as Hedging Instrument [Member]
USD ($)
|
Dec. 31, 2014
Foreign Exchange Contract [Member]
Accrued expenses and other current liabilities [Member]
Designated as Hedging Instrument [Member]
Cash Flow Hedge [Member]
USD ($)
|
Dec. 31, 2013
Foreign Exchange Contract [Member]
Accrued expenses and other current liabilities [Member]
Designated as Hedging Instrument [Member]
Cash Flow Hedge [Member]
USD ($)
|
Dec. 31, 2014
Foreign Exchange Contract [Member]
Accrued expenses and other current liabilities [Member]
Not Designated as Hedging Instrument [Member]
USD ($)
|
Dec. 31, 2014
Foreign Exchange Contract [Member]
Accrued expenses and other current liabilities [Member]
Not Designated as Hedging Instrument [Member]
ILS
|
Dec. 31, 2013
Foreign Exchange Contract [Member]
Accrued expenses and other current liabilities [Member]
Not Designated as Hedging Instrument [Member]
USD ($)
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Derivatives, Fair Value [Line Items] | ||||||||||||
| Fair value derivative asset | $ 153 | $ 3,753 | $ 301 | |||||||||
| Notional amount of derivative asset | 5,760 | 45,000 | 33,900 | 12,490 | ||||||||
| Fair value derivative liability | (1,243) | (2,901) | (1,543) | |||||||||
| Notional amount of derivative liability | 38,426 | 18,424 | 66,300 | 54,000 | ||||||||
| Fair value | (391) | (1,089) | ||||||||||
| Notional amount | $ 101,850 | $ 72,250 |